fix broken link

Author: tbrowder

doc/Programs/01-debugging.pod6

@@ -20,7 +20,7 @@ Historically others have existed and others are likely to be written in the futu
 check the L<Perl 6 Modules|https://modules.perl6.org/> website.
 
 There are also environment variables that can be set to aid debugging various aspects
-of your program.  See L<Perl 6 Environment Variables|https://docs.perl6.org/programs/running>
+of your program.  See L<Perl 6 Environment Variables|https://docs.perl6.org/programs/00-running#Environment_Variables>
 for more information.
 
 =head2 C<trace> pragma